CN106907146A - One kind control valve and hydrofracturing geodetic stress test device - Google Patents

One kind control valve and hydrofracturing geodetic stress test device Download PDF

Info

Publication number
CN106907146A
CN106907146A CN201710256332.XA CN201710256332A CN106907146A CN 106907146 A CN106907146 A CN 106907146A CN 201710256332 A CN201710256332 A CN 201710256332A CN 106907146 A CN106907146 A CN 106907146A
Authority
CN
China
Prior art keywords
overflow
valve
leading rod
valve body
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710256332.XA
Other languages
Chinese (zh)
Other versions
CN106907146B (en
Inventor
王丽新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PowerChina Zhongnan Engineering Corp Ltd
Original Assignee
PowerChina Zhongnan Engineering Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PowerChina Zhongnan Engineering Corp Ltd filed Critical PowerChina Zhongnan Engineering Corp Ltd
Priority to CN201710256332.XA priority Critical patent/CN106907146B/en
Publication of CN106907146A publication Critical patent/CN106907146A/en
Application granted granted Critical
Publication of CN106907146B publication Critical patent/CN106907146B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25—Methods for stimulating production
    • E21B43/26—Methods for stimulating production by forming crevices or fractures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

Abstract

The invention discloses one kind control valve, including leading rod, first pressure passage and second pressure passage, the spout hole with first pressure channel connection opened up in leading rod outer wall, overflow valve is being set with the leading rod outer wall in spout hole region, overflow valve includes hollow valve body, the overflow ducts connected with cavity in valve body that insertion is opened up on valve body wall；Leading rod is passed through from the middle cavity of valve body, and the drive device that overflow valve can be driven to be slided along leading rod outer wall is connected with the overflow valve；When the overflow valve is moved along leading rod, spout hole and overflow ducts can be docked and connected or stagger cut-off；Overflow valve top abuts the compressible elastomeric part for having and being sleeved on leading rod, and elastic component top abuts the limited block for having and being fixed on leading rod.Design by controlling valve of the invention, is capable of achieving packer easily pressurization and pressure release, so that the whole equipment stretched into drilling can be moved up and down easily, is conducive to the carrying out tested next time.

Description

One kind control valve and hydrofracturing geodetic stress test device
Technical field
The invention belongs to hydraulic fracturing crustal stress testing equipment, and in particular to one kind control valve and hydrofracturing geodetic should Power experimental rig.
Background technology
The principle of hydraulic fracturing crustal stress experiment is using a pair expandable rubber packers, in predetermined test depth One section of drilling of degree packing, is then pumped into liquid medium to packing section pressure, according to the characteristic value of fracturing process curve, can obtain brokenly The pressure parameters such as split pressure, instantaneous closing presure, reopening pressure, plane crustal stress states are directly inquired into by broken fractuer direction.
Conventional hydraulic loaded mode is divided to two kinds of single channel and binary channels at present, and single channel refers to packer and pressurized segment Hydraulic pressure is realized by a passage（Typically hollow drill）, by the pressure of drilling rod, pull out realize passage switch.Binary channels is to make With two independent pressure channels（Typically two high-voltage tubes）Packer and pressurized segment are pressurizeed respectively, by the switch on ground To control the pressure in two passages.
, it is necessary to experimental rig is moved into drilling other one section carries out phase after being finished in a certain section of experiment of drilling Same experiment.But in this course, above two device has common defect, because pressue device is placed in aperture, When test section is deeper, if anhydrous in hole, there is no external water pressure outside packer, the pressure that the water in packer is produced can cause Packer inflation is adjacent to hole wall, and the whole equipment stretched into drilling is blocked and cannot moved up and down, and leads to not be tried next time Test.But in the case of having larger external water pressure in drilling, external water pressure can balance out the dilation of packer so that stretch The equipment entered in drilling can be moved, therefore, the equipment of prior art is typically only applicable in the drilling of rich water, on dry hole or ground Using limited in the relatively low drilling of lower water level.
The content of the invention
Regarding to the issue above, the present invention is intended to provide a kind of hydrofracturing geodetic stress test device suitable for dry hole, And the control valve for matching.
The technical scheme of solve problem of the present invention is：One kind control valve, including leading rod, the insertion setting in leading rod Separate first pressure passage and second pressure passage, leading rod outer wall open up with first pressure channel connection Spout hole, is being set with overflow valve on the leading rod outer wall in spout hole region, and the overflow valve is included with middle cavity Valve body, the overflow ducts connected with cavity in valve body that insertion is opened up on valve body wall；
The leading rod is passed through from the middle cavity of valve body, and being connected with the overflow valve can drive overflow valve along leading rod outer wall The drive device of slip；When the overflow valve is moved along leading rod, spout hole and overflow ducts can be docked and connected or stagger cut-off；
The overflow valve top abuts the compressible elastomeric part for having and being sleeved on leading rod, and elastic component top abuts and is fixed on master Limited block on guide rod.
In such scheme, overflow valve is moved up and down under the drive of drive device along leading rod, when move to spout hole with When overflow ducts lead in succession, the liquid in first pressure passage realizes pressure release；When move to spout hole and overflow ducts stagger every When disconnected, first pressure passage is packing state.
Further, the overflow ducts include the ring overflow launder opened up around body cavity, vertical on valve body wall In the overflow pipe that valve body is axially opened up, the overflow pipe is interval with multiple around valve body wall, and each overflow pipe with overflow Chute is connected.
For better seal, in body cavity, the first sealing ring and are respectively equipped with above and below overflow launder Two sealing rings, on body cavity top and away from being provided with the 3rd sealing ring at the first sealing ring；
Spout hole is always positioned between the second sealing ring and the 3rd sealing ring.
Such scheme can ensure no matter spout hole is connected or cut-off state with overflow ducts, and the sealing of equipment is good It is good.
Specifically, the drive device includes the drawstring of the sleeve being connected with valve body wall and the connection of sleeve top, the drawing Rope is protruded upward and drilled and fixed.
Accordingly, the present invention also provides a kind of hydrofracturing geodetic stress test device, including spaced upper packing Device and lower packet, the forcing pipe that the upper packer includes hollow cartridge, passed through in cavity from cartridge, institute Stating lower packet includes hollow cartridge, by pipeline communication between upper packer and the cartridge of lower packet, also Including the control valve described in such scheme, the first pressure channel outlet of the control valve is docked with the cartridge of upper packer Connection, second pressure channel outlet is docked and connected with the forcing pipe of upper packer.
In the experimental rig, upper and lower packer is existing equipment, its assembling mode in drilling and routine techniques phase Together, after upper and lower packer enters drilling, the two surrounds the cavity to be formed with the wall of a borehole and is experiment pressurized segment.During experiment, pass through First pressure passage up, in the cartridge of lower packet injects liquid, by second pressure passage via forcing pipe toward plus Liquid is injected in pressure section.
Further, also packer compression system and second pressure passage including being connected with first pressure feeder connection The pressurized segment pressurization acquisition system of entrance connection.
Specifically, being provided with capstan winch at drilling orifice, the drive device includes the sleeve and sleeve that are connected with valve body wall The drawstring of top connection, the drawstring protrudes upward and drills and be coiled on capstan winch.
Design by controlling valve of the invention so that the equipment of hydraulic fracturing geodetic stress is provided with decompression function, especially In its drilling relatively low for dry hole or level of ground water, packer easily pressurization and pressure release are capable of achieving, so that stretching into brill Whole equipment in hole can be moved up and down easily, be conducive to the carrying out tested next time.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is main guide rod structure figure.
Fig. 2 is overflow valve front view.
Fig. 3 is overflow valve top view.
Fig. 4 is tube-in-tube structure figure.
Fig. 5 is control valve arrangement figure.
Fig. 6 is experimental rig structure chart.
Fig. 7 is upper packer structure chart.
Fig. 8 is lower packet structure chart.
In figure：1- leading rods, 2- overflow valves, 3- limited blocks, 4- elastic components, 5- sleeves, 6- drawstrings, 7- drillings are sealed on 8- Every device, 9- lower packets, 10- capstan winches, 11- first pressure passages, 12- second pressure passages, 13- spout holes, 21- valve bodies, 22- Overflow launder, 23- overflow pipes, the sealing rings of 24- first, the sealing rings of 25- second, the sealing rings of 26- the 3rd, 81- cartridges, 82- adds Pressure pipe, 100- packer compression systems, 101- pressurized segments pressurization acquisition system.
Specific embodiment
As shown in Fig. 1~5, one kind control valve, including leading rod 1, the first pressure passage that insertion is set in leading rod 1 11 and second pressure passage 12, the spout hole 13 connected with first pressure passage 11 that is opened up in the outer wall of leading rod 1.
Overflow valve 2 is being set with the outer wall of leading rod 1 in the region of spout hole 13.The overflow valve 2 includes hollow Valve body 21, the overflow ducts connected with cavity in valve body 21 that insertion is opened up on the wall of valve body 21.
The overflow ducts include the ring overflow launder 22 opened up around the inner chamber of valve body 21, on the wall of valve body 21 perpendicular to valve The overflow pipe 23 that body is axially opened up.The overflow pipe 23 is interval with multiple around the wall of valve body 21, and each overflow pipe 23 is equal Connected with overflow launder 22.
In the inner chamber of valve body 21, the first sealing ring 24 and the second sealing ring are respectively equipped with above and below overflow launder 22 25.On body cavity top and away from being provided with the 3rd sealing ring 26 at the first sealing ring 24.
Spout hole 13 is always positioned between the second sealing ring 25 and the 3rd sealing ring 26.
The leading rod 1 is passed through from the middle cavity of valve body 21, and being connected with the overflow valve 2 can drive the edge of overflow valve 2 The drive device that the outer wall of leading rod 1 is slided.The drive device includes that the sleeve 5 being connected with the wall of valve body 21 and the top of sleeve 5 connect The drawstring 6 for connecing.The drawstring 6 protrudes upward drilling 7 and fixes.
When the overflow valve 2 is moved along leading rod 1, spout hole 13 and overflow ducts can be docked and connected or stagger cut-off.
The top of the overflow valve 2 abuts the compressible elastomeric part 4 for having and being sleeved on leading rod 1, and the top of elastic component 4 abuts to be had It is fixed on the limited block 3 on leading rod 1.The elastic component is preferably spring.
As can be seen from figures 6 to 8, the present embodiment also provides a kind of hydrofracturing geodetic stress test device, including interval setting Upper packer 8 and lower packet 9.The upper packer 8 is including hollow cartridge 81, from cartridge 81 in cavity The forcing pipe 82 for passing through.Forcing pipe lower end is with holes.The lower packet 9 includes hollow cartridge 81.Upper packer 8 is with Pass through pipeline communication between the cartridge 81 of packer 9.
Also include the control valve described in such scheme, the outlet of first pressure passage 11 and the upper packer 8 of the control valve Cartridge 81 be docked and connected.The outlet of second pressure passage 12 is docked and connected with the forcing pipe 82 of upper packer 8.
Also include that the packer compression system 100 being connected with the entrance of first pressure passage 11 and second pressure passage 12 enter The pressurized segment pressurization acquisition system 101 of mouth connection.
Capstan winch 10 is provided with 7 apertures that drill, the drawstring 6 protrudes upward drilling 7 and is coiled on capstan winch 10.
After the completion of experimental rig assembling, first valve and upper and lower packer will be controlled to be put into appointed part with capstan winch 10, start examination Test, now overflow pipe 23 is not connected with spout hole 13, pressure can be passed in upper and lower packer, make the distending of cartridge 81.Examination After testing end, upward rope 6 because now upper and lower packer is in distending state, is adjacent to hole wall, it is impossible to mobile, only overflows Stream valve 2 can be moved up, compression spring while mobile, when on the spout hole 31 and overflow valve on leading rod 12 overflow pipe 23 During connection, the liquid in packer is flowed out in drilling from spout hole 13 via overflow pipe 23, pressure release, upper and lower packer It is slow to shrink.When upper and lower packer is no longer adjacent to hole wall, under the rebound effect of spring, overflow valve 2 is moved down, overflow Hole 13 and overflow pipe 23 stagger cut-off, and the pressure channel of upper packer 8 is isolated from the outside, can now move experimental rig again To next test section, continue to test.

Claims (7)

  1. It is 1. a kind of to control valve, it is characterised in that：Including leading rod（1）, in leading rod（1）Interior insertion set separate the One pressure channel（11）And second pressure passage（12）, in leading rod（1）Outer wall open up with first pressure passage（11）Even Logical spout hole（13）, positioned at spout hole（13）The leading rod in region（1）Overflow valve is set with outer wall（2）, the overflow Valve（2）Including the valve body with middle cavity（21）, in valve body（21）On wall insertion open up and valve body（21）Middle cavity connection Overflow ducts；
    The leading rod（1）From valve body（21）Middle cavity in pass through, the overflow valve（2）On be connected with and can drive overflow valve （2）Along leading rod（1）The drive device that outer wall is slided；The overflow valve（2）Along leading rod（1）When mobile, spout hole（13）With Overflow ducts can be docked and connected or stagger cut-off；
    The overflow valve（2）Top abuts and is sleeved on leading rod（1）On compressible elastomeric part（4）, elastic component（4）Top is supported It is connected to and is fixed on leading rod（1）On limited block（3）.
  2. 2. control valve according to claim 1, it is characterised in that：The overflow ducts are included around valve body（21）Open inner chamber If ring overflow launder（22）, in valve body（21）The overflow pipe axially opened up perpendicular to valve body on wall（23）, the overflow pipe （23）Around valve body（21）Wall is interval with multiple, and each overflow pipe（23）And overflow launder（22）Connection.
  3. 3. control valve according to claim 2, it is characterised in that：In valve body（21）Inner chamber, positioned at overflow launder（22）Top Be respectively arranged below with the first sealing ring（24）With the second sealing ring（25）, on body cavity top and away from the first sealing ring （24）Place is provided with the 3rd sealing ring（26）；
    Spout hole（13）It is always positioned at the second sealing ring（25）With the 3rd sealing ring（26）Between.
  4. 4. control valve according to claim 1, it is characterised in that：The drive device includes and valve body（21）Wall connection Sleeve（5）With sleeve（5）The drawstring of top connection（6）, the drawstring（6）Protrude upward drilling（7）And it is fixed.
  5. 5. a kind of hydrofracturing geodetic stress test device, including spaced upper packer（8）And lower packet（9）, institute State upper packer（8）Including hollow cartridge（81）, from cartridge（81）The forcing pipe passed through in middle cavity（82）, institute State lower packet（9）Including hollow cartridge（81）, upper packer（8）With lower packet（9）Cartridge（81）It Between pass through pipeline communication, it is characterised in that：Also include the control valve described in any one of the claims 1~4, the control valve First pressure passage（11）Outlet and upper packer（8）Cartridge（81）It is docked and connected, second pressure passage（12）Go out Mouth and upper packer（8）Forcing pipe（82）It is docked and connected.
  6. 6. hydrofracturing geodetic stress test device according to claim 5, it is characterised in that：Also include and first pressure Passage（11）The packer compression system of entrance connection（100）With second pressure passage（12）The pressurized segment pressurization of entrance connection Acquisition system（101）.
  7. 7. hydrofracturing geodetic stress test device according to claim 5, it is characterised in that：In drilling（7）At aperture It is provided with capstan winch（10）, the drive device include and valve body（21）The sleeve of wall connection（5）With sleeve（5）The drawing of top connection Rope（6）, the drawstring（6）Protrude upward drilling（7）And it is coiled in capstan winch（10）On.
CN201710256332.XA 2017-04-19 2017-04-19 Control valve and hydrofracturing geodesic stress test device Active CN106907146B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710256332.XA CN106907146B (en) 2017-04-19 2017-04-19 Control valve and hydrofracturing geodesic stress test device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710256332.XA CN106907146B (en) 2017-04-19 2017-04-19 Control valve and hydrofracturing geodesic stress test device

Publications (2)

Publication Number Publication Date
CN106907146A true CN106907146A (en) 2017-06-30
CN106907146B CN106907146B (en) 2023-04-07

Family

ID=59211158

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710256332.XA Active CN106907146B (en) 2017-04-19 2017-04-19 Control valve and hydrofracturing geodesic stress test device

Country Status (1)

Country Link
CN (1) CN106907146B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107448169A (en) * 2017-08-28 2017-12-08 中国地质科学院地质力学研究所 A kind of three-body type Hydraulic Fracturing Stress Measurements Push-and-pull valve
CN107829725A (en) * 2017-12-06 2018-03-23 中国地质科学院地质力学研究所 A kind of water causes pressure break stress measurement with inducing crack dynamic imaging integrating device
CN107859512A (en) * 2017-12-05 2018-03-30 山东科技大学 Two section type roof and floor surrounding rock failure scope observation system
CN109915099A (en) * 2019-04-11 2019-06-21 中国地质科学院地质力学研究所 High pressure water circuit control device and water pressure supporing system
CN110130865A (en) * 2019-06-06 2019-08-16 中国地质科学院地质力学研究所 A kind of push-and-pull switch component that can eliminate system compliance
CN113218773A (en) * 2021-04-13 2021-08-06 赵雅清 Hydrofracturing stress detection device

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9213783D0 (en) * 1991-07-11 1992-08-12 Schlumberger Ltd Fracturing method and apparatus
US5715897A (en) * 1993-12-13 1998-02-10 G-Drill Ab In-hole rock drilling machine with a hydraulic impact motor
JPH11148295A (en) * 1997-11-18 1999-06-02 Techno Core:Kk Packer system
RU2201495C2 (en) * 2000-10-10 2003-03-27 Дочерняя Компания "Укргазвыдобування" Packer
US20040130086A1 (en) * 2001-03-22 2004-07-08 Takayuki Kawakami Work support
CN203214983U (en) * 2013-04-08 2013-09-25 宁波富斯乐机械制造有限公司 Differential pressure type high pressure retaining overflow valve for high-pressure plunger pump
CN203626793U (en) * 2013-12-10 2014-06-04 中国石油集团西部钻探工程有限公司 Reliable differential pressure sliding sleeve
CN105716747A (en) * 2016-02-18 2016-06-29 中国矿业大学 Crustal stress rapid measuring device and method of rock stratum under coal mine
CN205714149U (en) * 2016-06-12 2016-11-23 中国地震局地壳应力研究所 Hydraulic fracturing stress measurement device
CN205858333U (en) * 2016-05-13 2017-01-04 浙江华东工程安全技术有限公司 A kind of three plug hydraulic fracturing detecting earth stress systems
CN206694021U (en) * 2017-04-19 2017-12-01 中国电建集团中南勘测设计研究院有限公司 A kind of control valve and hydrofracturing geodetic stress test device

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9213783D0 (en) * 1991-07-11 1992-08-12 Schlumberger Ltd Fracturing method and apparatus
US5715897A (en) * 1993-12-13 1998-02-10 G-Drill Ab In-hole rock drilling machine with a hydraulic impact motor
JPH11148295A (en) * 1997-11-18 1999-06-02 Techno Core:Kk Packer system
RU2201495C2 (en) * 2000-10-10 2003-03-27 Дочерняя Компания "Укргазвыдобування" Packer
US20040130086A1 (en) * 2001-03-22 2004-07-08 Takayuki Kawakami Work support
CN203214983U (en) * 2013-04-08 2013-09-25 宁波富斯乐机械制造有限公司 Differential pressure type high pressure retaining overflow valve for high-pressure plunger pump
CN203626793U (en) * 2013-12-10 2014-06-04 中国石油集团西部钻探工程有限公司 Reliable differential pressure sliding sleeve
CN105716747A (en) * 2016-02-18 2016-06-29 中国矿业大学 Crustal stress rapid measuring device and method of rock stratum under coal mine
CN205858333U (en) * 2016-05-13 2017-01-04 浙江华东工程安全技术有限公司 A kind of three plug hydraulic fracturing detecting earth stress systems
CN205714149U (en) * 2016-06-12 2016-11-23 中国地震局地壳应力研究所 Hydraulic fracturing stress measurement device
CN206694021U (en) * 2017-04-19 2017-12-01 中国电建集团中南勘测设计研究院有限公司 A kind of control valve and hydrofracturing geodetic stress test device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王成虎等: "水压致裂应力测量系统柔性分析及其对深孔测量的影响" *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107448169A (en) * 2017-08-28 2017-12-08 中国地质科学院地质力学研究所 A kind of three-body type Hydraulic Fracturing Stress Measurements Push-and-pull valve
CN107859512A (en) * 2017-12-05 2018-03-30 山东科技大学 Two section type roof and floor surrounding rock failure scope observation system
CN107859512B (en) * 2017-12-05 2022-03-04 山东科技大学 Double-section type top and bottom plate surrounding rock damage range observation system
CN107829725A (en) * 2017-12-06 2018-03-23 中国地质科学院地质力学研究所 A kind of water causes pressure break stress measurement with inducing crack dynamic imaging integrating device
CN109915099A (en) * 2019-04-11 2019-06-21 中国地质科学院地质力学研究所 High pressure water circuit control device and water pressure supporing system
CN110130865A (en) * 2019-06-06 2019-08-16 中国地质科学院地质力学研究所 A kind of push-and-pull switch component that can eliminate system compliance
CN110130865B (en) * 2019-06-06 2023-12-29 中国地质科学院地质力学研究所 Push-pull switch assembly capable of eliminating system flexibility
CN113218773A (en) * 2021-04-13 2021-08-06 赵雅清 Hydrofracturing stress detection device

Also Published As

Publication number Publication date
CN106907146B (en) 2023-04-07

Similar Documents

Publication Publication Date Title
CN106907146A (en) One kind control valve and hydrofracturing geodetic stress test device
CN108119094B (en) Two-plugging one-injection one-row hole sealing device for deep coal seam gas extraction drilling and use method
CN104100225B (en) annular barrier and annular barrier system
CN103774992B (en) The drive unit of bloat tool under cased well
CN206694021U (en) A kind of control valve and hydrofracturing geodetic stress test device
CN108625819B (en) Fixed hole sealing of gas drainage and leaking stoppage integrated device
CN109267983B (en) Horizontal well repeated fracturing device and method based on open hole preset pipe string well completion
CN104314546A (en) Staged fracturing completion string in horizontal well casing and staged fracturing process
EP2576981A1 (en) Through the drill string or core bit dst system
CN104662255A (en) Pressure testing valve and method of using the same
CN109296348B (en) Toe end sliding sleeve capable of being opened in time delay mode
CN105452602B (en) Sponge pressure equalization system
US2640542A (en) Sidewall sample taking device
CN108661035A (en) Packer permeability test equipment
CN113338884B (en) Single-loop hydrofracturing and impression integrated ground stress testing device and method
CN205605879U (en) Water pressure test in borehole water pressure formula embolism drainage depressurization mechanism
US3630640A (en) Method and apparatus for gas-lift operations in oil wells
CN204532254U (en) A kind of compression relief cock valve and Oil/gas Well are tested and are altered, test and leakage use tubing string
CN102650200A (en) Shot-free unidirectional blocking valve
CN207348820U (en) Formation testing samples twin packer
RU2534876C1 (en) Double-packer installation for operation of well with electrically driven pump, simultaneous isolation of untight interval and circulation valve
CN104632195B (en) A kind of gaslift helps flowing water horizontal well searching pipe column and method
KR20080113652A (en) Apparatus for observing water level recovery
CN108343396A (en) A kind of remote pressure control self-sealing underground pressure difference sliding sleeve
CN105626620B (en) Downhole electric control is surged Bidirectional power device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant